As an expert in the field of astronomy, I can provide you with information on the largest known stars. The size of a star is typically measured in terms of its radius compared to the Sun, which is considered to have a radius of about 1 solar radius (R☉). The largest known stars are red supergiants, which are in the very late stages of their life cycles.

The largest star currently identified is UY Scuti, which is a red supergiant located in the constellation Scutum. Its radius is estimated to be about 1,700 times that of the Sun, which means if you replaced the Sun with UY Scuti, it would extend beyond the orbit of Jupiter.

However, it's important to note that measurements of such distant and large objects are subject to revision as new data and better observation techniques become available.

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Following this discovery, UY Scuti was officially named the largest known star in the galaxy, surpassing previous record holders such as Betelgeuse, VY Canis Majoris, and NML Cygni.read more >>